An application does not create an instance of the IDbDataAdapter interface directly, but implements an instance of a class that inherits IDbDataAdapter.

Classes that inherit IDataAdapter must implement the inherited members, and they typically define additional members to add provider-specific functionality. For example, the IDataAdapter interface defines a Fill method that takes a DataSet as a parameter. In turn, the OleDbDataAdapter class inherits the Fill method and also defines two additional overloads of the Fill method that take an ADO Recordset object as a parameter.

Notes to Implementers

To promote consistency among .NET Framework data providers, name the inheriting class in the form Prv DataAdapter where Prv is the uniform prefix given to all classes in a specific .NET Framework data provider namespace. For example, Sql is the prefix of the SqlDataAdapter class in the System.Data.SqlClient namespace.

When you inherit from the IDataAdapter interface, you should implement the following constructors:

Item

Description

PrvDataAdapter()

Initializes a new instance of the PrvDataAdapter class.

PrvDataAdapter(PrvCommand selectCommand)

Initializes a new instance of the PrvDataAdapter class by using the specified SQL SELECT statement.

The following example uses the derived classes, SqlCommand, SqlDataAdapter, and SqlConnection, to select records from a database. The filled DataSet is then returned. To do this, the method is passed an initialized DataSet, a connection string, and a query string that is a Transact-SQL SELECT statement.